Final answer:
The adjective in the sentence 'Tanya is a graceful dancer.' is 'c. Graceful', which describes the noun 'dancer'.
Step-by-step explanation:
The adjective in the sentence 'Tanya is a graceful dancer.' is c. Graceful. Adjectives are words that describe or modify nouns or pronouns by giving additional information about their quantity, quality, size, etc. In this sentence, 'graceful' describes the noun 'dancer', indicating the manner in which Tanya dances.
An adjective is a word that describes or modifies a noun or pronoun. In this sentence, 'graceful' describes the noun 'dancer'. It tells us what kind of dancer Tanya is.
Therefore, 'graceful' is the word that adds meaning to the noun by describing Tanya's dancing style. This differentiates it from the other options provided, as 'dancer' is a noun, 'is' is a verb, and 'Tanya' is a proper noun.